[Healeys] Curved/quiet or Straight/efficent

Perry healeyguy at aol.com
Fri Jan 24 14:41:25 MST 2020

Sir Patrick
Please peruse the web site at: https://daviescraig.com.au/blog/straight-vs-curved-fan-blades-dispelling-the-myth
They must have the best info on the globe since they are located down under! 😊

Sent from Mail for Windows 10

From: Patrick & Caroline Quinn
Sent: Friday, January 24, 2020 4:27 PM
To: healeys at autox.team.net
Subject: [Healeys] Curved or Straight


Once again I am about to investigate the engine cooling of the Healey Duncan. Nothing highly unusual with it in that it’s a Riley 2.4 litre engine and unpressurised.

Part of the process is to replace the existing Kenlowe electric fan with a more modern unit. The Kenlow sits over an inch from the radiator surface while a modern unit should only be a few millimetres. Of course it was never fitted with an electric fan when new, but it’s simply not coping with the warmer Australian climate.

I will be doing all sorts of wonderful things like removing the cylinder head to replace the cooling tube between number two and three combustion chamber, refurbishing the radiator, rodding the block etc etc.

The question that’s on my mind concerns whether to install an electric fan with curved or straight blades. Australian manufacturer Davies Craig says that straight blades are best, but they would say that as that’s what they make.

Anyone undertaken any research as to what’s the most efficient?

Hoo Roo

Patrick Quinn
Blue Mountains, Australia
Where it’s raining again - wonderful

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